December 11

Concerning your… question referring to a purported Tablet of the Báb stating that there were thirty Zoroasters, the Research Department states that no text from the Báb has been found on this subject. However, Mirza Abu'l-Fadl has stated in his writings that there appeared in Iran many prophets prior to the Dispensation of Zoroaster. 
- The Universal House of Justice  (From a message dated 13 May 1979 written on behalf of the Universal House of Justice to an individual believer)